Efficacy of native isolates of Saccharomyces cerevisiae, Trichoderma harzianum and T. ressei in the biocontrol of Meloidogyne incognita and Rotylenchulus reniformis on jasmine in comparison to nematicide vydate under flood irrigation regime in Egypt
2005
Ismail, A.E. (National Research Centre , Giza (Egypt). Dept. of Plant Pathology and Microbial Chemistry) | Hasabo, S.A. (National Research Centre , Giza (Egypt). Dept. of Plant Pathology and Microbial Chemistry) | El-Nagdi, W.M.A. (National Research Centre , Giza (Egypt). Dept. of Plant Pathology and Microbial Chemistry) | Fadel, M.M. (National Research Centre , Giza (Egypt). Dept. of Plant Pathology and Microbial Chemistry)
Six Egyptian biological compounds viz., dry active yeast Saccharomyces cerevisiae FT 700, Trichoderma harzianum F 717, S. cerevisiae FT 700 + T. harzianum F 717, T. harzianum F 416, S. cerevisiae FT 700 and T. ressei F 418 as well as vydate (Oxamyl 24% L) a nematicide were tested at three different rates for the control of Meloidogyne incognita and Rotylenchulus reniformis infesting jasmine under field conditions. All the tested products significantly reduced (p less than 0.05 and / or 0.01) M. incognita and R. reniformis populations in soil and roots as compared to untreated control. Statistical differences at 0.05 and / or 0.01 levels in M. incognita and R. reniformis populations were found within some treatments and also between the doses of the same treatment. Direct comparison between most successful treatments due to their effectiveness on percentage reduction in nematode populations showed that the intermediate dose (120g / tree) of T. harzianum F 717 isolate was superior in three periods (May-July) followed by 60 g / tree of dry active yeast S. cerevisiae FT 700 isolate when used twice and, 120 g / tree of T. harzianum F 416 when used once in reducing M. incognita populations either in soil or roots as compared to other treatments. Similarly, high dose of T. ressei F 418 isolate was superior in three treatments and intermediate dose of a mixture of dry active yeast S. cerevisiae + T. harzianum F 717 was superior when used singly. The Vydate treatment was superior when used twice in reducing R. renifbormis populations either in soil or roots as compared to other treatments.
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